49. tan* x cos For the following exercises, find the exact value using half-angle formulas. cos(-12) For the follow check the ans 13. sin 8. 11t 15. sin 11n 7л 16. cos 12 8. 53. sin(4x) Зл 17. tan 12 Зл 18. tan 19. tan 12 EXTENSIOR For the following exercises, find the exact values of a) sin For the foll х х ), b) cos (), and c) tan without solving for x. 2 55. sin(2. 4 and x is in quadrant IV. 20. If tan x =- 12 and x is in quadrant III. 13 21. If sin x =- 22. If csc x = 7, and x is in quadrant II. 23. If sec x = -4, and x is in quadrant II. 57. tan(2 59. sin( 61. sir 63. co V2 – V3 15. 17. 2+ V3 19. –1 - 3V13 b. 2/13 C. 3 21. a. 13 13 2 V10 V15 120 25. 169 V6 23. a. 4 b. C. 4 3 2V13 3V/13 2

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.